tyre failed- spare a different size- and replace both?

[Fluff34567]

Had some vibration on an autoroute run and found the rear LH tyre carcass had failed leaving me with a big lump on the tread area. I have 215/60/17 year 2017 fitted all round and found the spare is 235/55/17 year 16 ... is that normal ? Van wasn't new so maybe previous owner changed to smaller profile given the different manufacturer dates.

Guess also I need change both tyres on same axle due to 4motion?

 

[Wills]

They are pretty much compatible running together. See attached

 

[DaveD]

Had some vibration on an autoroute run and found the rear LH tyre carcass had failed leaving me with a big lump on the tread area. I have 215/60/17 year 2017 fitted all round and found the spare is 235/55/17 year 16 ... is that normal ? Van wasn't new so maybe previous owner changed to smaller profile given the different manufacturer dates.

Guess also I need change both tyres on same axle due to 4motion?

In an emergency your spare will be fine and will create no issues with the 4Motion system because it is only 0.07% different to the tyres fitted to your van;

Alloy Wheel & Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit

Alloy Wheel & tyre fitment calculator - it calculates inset, poke, speedo error, tyre stretch and loads more.

www.willtheyfit.com

 

[DaveD]

@Wills - great minds think alike, I'm a bit slow on the laptop!